The newly-formed Earth’s atmosphere was very different from Earth’s current atmosphere because it had ____
a. an abundance of mercury vapor
b. an enormous amount of carbon dioxide, resulting in very hot temperatures due to greenhouse effect
c. virtually no oxygen, a necessary component for the existence of animal life
d. an enormous amount of methane and ammonia, which was never lost by the atmospheres of the outer planets
e. virtually no nitrogen, the major component of today’s atmosphere
c
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83% of the energy used in the U.S. comes from renewable energy sources.
Answer the following statement true (T) or false (F)
Which location on this figure from the Investigation is located on a passive continental margin?
A) 1
B) 2
C) 3
D) 4
E) 5
Radon ________
A) binds with hemoglobin, preventing binding with oxygen B) may cause lung cancer when inhaled C) contributes to the breakdown of the ozone layer D) in the atmosphere limits the availability of sunlight for plants E) is formed by the breakdown of the ozone layer
A major oil spill associated with the transporting of oil was grounding of the supertanker ________ in 1988
A) Exxon Valdez B) America Trader C) Deepwater Horizon D) Prestige E) Alaska Monitor